Valve.



J G. NOLEN.

. VALVE. APPLIOATION PILEJ $52126, 1904.

mmm June 28. 1910.

UNITED STATES PATENT OFFICE.

JAMES G. NOLEN, 0F .CHICAGO ILLINOIS, ASSIGNOR,A BY MESNE ASSIGNMENTS, T0 AUTOMATIC FIRE PROTECTION COMPANY. A CORPORATION 0F MAINE.

VALVE.

specification of Letters Patent. Patented June 28, 1910.

Application filed September 6, 1904. Serial No. 228,535.

To all whom 'it may concern:

Be it known that l, JAMES Gr. Nouan, of Chicago, in the county of Cook and State ot Illinois, have invented certain new and useful Improvements in `Valves; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form part of this specification.4

My invention relates to improvements in valves, and has for a salient object to provide a pivoted valve, such as a check valve, wherein thepivotal stem extends to the exterior of the valve, wherein the construction is such as to do away with the necessity of packing the joint made by the stem and the casing.

A further object of my invention is to provide such a flexible connection between the pivotal stem proper of the valve and the stem extension projecting from the eX- terior of the casing, that distortion or displacement of the .stem proper will not a'ect the jointbetween the stem extension and the casing member.

A yet further object is to provide a gravity check valve in which the movable member is normally maintained in open position when the valve casing is full of water.

Other and further Vobjects will become yapparent from the following description, and the appended claims. taken .in conjunction with the accompanyingr drawings, wherein,

Figure 1 is a transverse vertical section of a valve embodying my invention. Fig. 2 is a horizontal cross section on line 2-2 of Fig. 1. Fig. 3 is an enlarged development oi some o'tl the parts shown in Fig. 2.

'lhroughout the drawings like numerals otn reference refer always to like parts.

ln the drawings :1 5 indicates generally two pipe sections connected by a valve casing t3. The casing t3 may be of any suitable construction to provide a seat 7 surrounding a chamber S of suitable size to receive a float to be hereafter described; and to atlord bearings for the parts to be specified.

t) indicates a valve proper, having securely attached to rits under surface a float 10, preterably a liollow ball adapted to be partially titled with air and preferably provided with perforations ttl near the bottom thereof, so 'hat the float. when inunersed acts like a diving bell. lhe lloat l0' should be'of such buoyancy that when the casing is filled with water the valve 9 and its associated parts are maintained in raised position.

The valve t) is secured to a pivoted stem 11 as by a set screw 9 so that it oscillates with the stem 11. The portion of the stem to which the valve is directly secured, and which l will advert to as the stem proper, (to distinguish it. from another stem-portion to he described) finds bearing on one side in a suitable water-tight part 12, in which it,`

may preferably have some longitudinal play, and atits opposite end projects into a recess 13 made in one side of the valve casing 6. At said end the stem 11 is provided with a head 14, preferably presenting a curved surface 15, and provided with a projecting feather 16 extending preferably Centrally thereacross. Between the head 14 and the abutment G which forms the end of the recess 13 is interposed a spring 17 which bears against the head y14: and tends constantly to press the stem to its outward of movement.

1S indicates a portion of the stem which I will term the stein-extension, provided on its inner end with a head 19 shaped to correspond with the curved portion 15 of the head -t of the stem proper, and provided with a kert 20 to loosely receive the feather 16. The head 19 is provided with a suitable bearing surface 21, preferably conical in form, which may be a ground surface integral with the head 19, as shown in Fig. 2, or may be, as illustrated in Fig. 3, a body of glass, agate or other suitable hard material fitted on the stem.

Q2 indicates a cap screw-threaded for engagement with the threaded end of the recess 13 to close the same, and provided with al1 aperture Q3 through which the stem extension 18 projects. said aperture 23 terminating in a ground scat Qi shaped to conform with the bearing member 21 of the stem extension.

The parts are assembled in the relation shown in Fig. 2, and it; will be apparent that spring 17 exerting its tension against the head let, of the stem proper, presses the associated stem extension outwardly, so that its bearing portion 21 makes intimate Contact with the beveled seat Q4. Further, it will` be noted that thel coacting curved Surfaces 15 of the heads 1-1 and 1t) connected `against; relative rotation by the feather 16, form a limit flexible joint, giving the stern portions l1 and 18 considerable play relative to each other Without disturbing their operative connection for movement together. This arrange ment insures the proper and exact settingar of the bearing member 21, Without reference to the exact alinement or other conditions of the Stein-proper 11, so that displacement ot the valve stem proper l1, due to inequality in wear, or'unbala'nced strains thereon, has no '1 elect to loosen the joint between the stem extension and the casing part with which it coacts.

It will be apparent that when the float is employed in the valve, the valve will be unaffected by water flow but will close upon a drop of the water level below the level of vided with a carved head arranged in said recess7 a Spring between Said head and the bottom ot the reces...- a cap covering the month ot' Said recess. and ha ving an aperture therethrough surr( aaded with a hearing surface, a second Stem part arranged to.

project through `Said aperture and seat on aid bearing' surface, and means connecting the valve etem'parhl tor rotation.

2. In a valve eomprieing a eaaing` an oscillating tlap valve. a I"teni to which said oscillatingr flap valve is secured projertiner through the valve eaeing and eomprieine two partis havingr complementary coactinpr curved heads. one prmided with a reeesa and the other n'ith a projection engaging Said recess, a hearinghr surface on that stem part nhieh extends to the exterior of the, easing, and a seat Vt'or said surface in the casing.

ln testimony thatttflaim the foregoingI as my own, I allix myeignature in presence ot two witneeses.

' JANIES (i. NLEL. In presence of- (ino. T. MAY, Jr.,

MARY F. ALLEN. 

